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Science fiction writers have suggested a future Earth populated by a blend of all races into a common human form.
In real life, the reverse seems to be happening. People are evolving more rapidly than in the distant past, with residents of various continents becoming increasingly different from one another, researchers say.
"I was raised with the belief that modern humans showed up 40,000 to 50,000 years ago and haven't changed," explained Henry C. Harpending, an anthropologist at the University of Utah. "The opposite seems to be true."
"Our species is not static," Harpending added in a telephone interview.
Originally posted by plumranch
How could increased diversity be occurring?
That study and others dealing with genetic differences among humans – whose DNA is more than 99 percent identical – generated fears such research will undermine the principle of human equality and justify racism and discrimination. Other critics question the quality of the science and argue culture plays a bigger role than genetics.
Harpending says genetic differences among different human populations “cannot be used to justify discrimination. Rights in the Constitution aren’t predicated on utter equality. People have rights and should have opportunities whatever their group.”
I think it only happens in back-water regions where people aren't more metropolitan and tolerant. Not knocking rural areas, just criticizing the intolerant folk that exists aplenty in those area.